set @save_query_cache_size=@@query_cache_size; SET GLOBAL query_cache_type= Off; SET LOCAL query_cache_type= Off; SET LOCAL query_cache_type= 0; SET LOCAL query_cache_type= on; ERROR HY000: Query cache is globally disabled and you can't enable it only for this session SET LOCAL query_cache_type= 1; ERROR HY000: Query cache is globally disabled and you can't enable it only for this session set GLOBAL query_cache_size=1355776; SET GLOBAL query_cache_type= ON; SET LOCAL query_cache_type= ON; flush query cache; flush query cache; reset query cache; flush status; drop table if exists t1,t2,t3,t4,t11,t21,t1_1,t1_2,t9,t9_1,t9_2; drop database if exists mysqltest; drop table if exists ```a`; drop view if exists v1; create table t1 (a int not null); insert into t1 values (1),(2),(3); select * from t1; a 1 2 3 select * from t1; a 1 2 3 select sql_no_cache * from t1; a 1 2 3 select length(now()) from t1; length(now()) 19 19 19 show status like "Qcache_queries_in_cache"; Variable_name Value Qcache_queries_in_cache 1 show status like "Qcache_inserts"; Variable_name Value Qcache_inserts 1 show status like "Qcache_hits"; Variable_name Value Qcache_hits 1 drop table t1; show status like "Qcache_queries_in_cache"; Variable_name Value Qcache_queries_in_cache 0 create table t1 (a int not null) ENGINE=MyISAM; insert into t1 values (1),(2),(3); create table t2 (a int not null) ENGINE=MyISAM; insert into t2 values (4),(5),(6); create table t3 (a int not null) engine=MERGE UNION=(t1,t2) INSERT_METHOD=FIRST; select * from t3; a 1 2 3 4 5 6 select * from t3; a 1 2 3 4 5 6 show status like "Qcache_hits"; Variable_name Value Qcache_hits 2 show status like "Qcache_queries_in_cache"; Variable_name Value Qcache_queries_in_cache 1 insert into t2 values (7); show status like "Qcache_queries_in_cache"; Variable_name Value Qcache_queries_in_cache 0 select * from t1; a 1 2 3 select * from t1; a 1 2 3 show status like "Qcache_hits"; Variable_name Value Qcache_hits 3 show status like "Qcache_queries_in_cache"; Variable_name Value Qcache_queries_in_cache 1 insert into t3 values (8); show status like "Qcache_queries_in_cache"; Variable_name Value Qcache_queries_in_cache 0 select * from t3; a 1 2 3 8 4 5 6 7 show status like "Qcache_queries_in_cache"; Variable_name Value Qcache_queries_in_cache 1 update t2 set a=9 where a=7; show status like "Qcache_queries_in_cache"; Variable_name Value Qcache_queries_in_cache 0 select * from t1; a 1 2 3 8 show status like "Qcache_queries_in_cache"; Variable_name Value Qcache_queries_in_cache 1 update t3 set a=10 where a=1; show status like "Qcache_queries_in_cache"; Variable_name Value Qcache_queries_in_cache 0 select * from t3; a 10 2 3 8 4 5 6 9 show status like "Qcache_queries_in_cache"; Variable_name Value Qcache_queries_in_cache 1 delete from t2 where a=9; show status like "Qcache_queries_in_cache"; Variable_name Value Qcache_queries_in_cache 0 select * from t1; a 10 2 3 8 show status like "Qcache_queries_in_cache"; Variable_name Value Qcache_queries_in_cache 1 delete from t3 where a=10; show status like "Qcache_queries_in_cache"; Variable_name Value Qcache_queries_in_cache 0 drop table t1, t2, t3; set query_cache_type=demand; create table t1 (a int not null); insert into t1 values (1),(2),(3); select * from t1; a 1 2 3 show status like "Qcache_queries_in_cache"; Variable_name Value Qcache_queries_in_cache 0 select sql_cache * from t1 union select * from t1; a 1 2 3 set query_cache_type=2; select sql_cache * from t1 union select * from t1; a 1 2 3 show status like "Qcache_hits"; Variable_name Value Qcache_hits 4 show status like "Qcache_queries_in_cache"; Variable_name Value Qcache_queries_in_cache 1 set query_cache_type=on; reset query cache; show status like "Qcache_queries_in_cache"; Variable_name Value Qcache_queries_in_cache 0 select sql_no_cache * from t1; a 1 2 3 show status like "Qcache_queries_in_cache"; Variable_name Value Qcache_queries_in_cache 0 drop table t1; create table t1 (a text not null); select CONNECTION_ID() from t1; CONNECTION_ID() select FOUND_ROWS(); FOUND_ROWS() 0 select NOW() from t1; NOW() select CURDATE() from t1; CURDATE() select CURTIME() from t1; CURTIME() select DATABASE() from t1; DATABASE() select ENCRYPT("test") from t1; ENCRYPT("test") select LAST_INSERT_ID() from t1; LAST_INSERT_ID() select RAND() from t1; RAND() select UNIX_TIMESTAMP() from t1; UNIX_TIMESTAMP() select USER() from t1; USER() select CURRENT_USER() from t1; CURRENT_USER() select benchmark(1,1) from t1; benchmark(1,1) explain extended select benchmark(1,1) from t1; id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 system NULL NULL NULL NULL 0 0.00 Const row not found Warnings: Note 1003 select benchmark(1,1) AS `benchmark(1,1)` from `test`.`t1` show status like "Qcache_queries_in_cache"; Variable_name Value Qcache_queries_in_cache 0 create table t2 (a text not null); insert into t1 values("1111111111111111111111111111111111111111111111111111"); insert into t2 select * from t1; insert into t1 select * from t2; insert into t2 select * from t1; insert into t1 select * from t2; insert into t2 select * from t1; insert into t1 select * from t2; insert into t2 select * from t1; insert into t1 select * from t2; insert into t2 select * from t1; insert into t1 select * from t2; insert into t2 select * from t1; insert into t1 select * from t2; insert into t2 select * from t1; insert into t1 select * from t2; insert into t2 select * from t1; insert into t1 select * from t2; insert into t2 select * from t1; insert into t1 select * from t2; show status like "Qcache_hits"; Variable_name Value Qcache_hits 4 show status like "Qcache_lowmem_prunes"; Variable_name Value Qcache_lowmem_prunes 0 select a as a1, a as a2 from t1; select a as a2, a as a3 from t1; select a as a3, a as a4 from t1; select a as a1, a as a2 from t1; show status like "Qcache_hits"; Variable_name Value Qcache_hits 4 show status like "Qcache_queries_in_cache"; Variable_name Value Qcache_queries_in_cache 2 show status like "Qcache_lowmem_prunes"; Variable_name Value Qcache_lowmem_prunes 2 reset query cache; insert into t2 select * from t1; insert into t1 select * from t2; insert into t2 select * from t1; insert into t1 select * from t2; insert into t2 select * from t1; insert into t1 select * from t2; insert into t2 select * from t1; insert into t1 select * from t2; insert into t2 select * from t1; insert into t1 select * from t2; select * from t1; show status like "Qcache_queries_in_cache"; Variable_name Value Qcache_queries_in_cache 0 drop table t1,t2; create database mysqltest; create table mysqltest.t1 (i int not null auto_increment, a int, primary key (i)); insert into mysqltest.t1 (a) values (1); select * from mysqltest.t1 where i is null; i a create table t1(a int); select * from t1; a show status like "Qcache_queries_in_cache"; Variable_name Value Qcache_queries_in_cache 2 select * from mysqltest.t1; i a 1 1 show status like "Qcache_queries_in_cache"; Variable_name Value Qcache_queries_in_cache 3 drop database mysqltest; show status like "Qcache_queries_in_cache"; Variable_name Value Qcache_queries_in_cache 1 drop table t1; create table t1 (a char(1) not null collate koi8r_general_ci); insert into t1 values(_koi8r"á"); set CHARACTER SET koi8r; select * from t1; a á set CHARACTER SET cp1251_koi8; select * from t1; a À set CHARACTER SET DEFAULT; show status like "Qcache_queries_in_cache"; Variable_name Value Qcache_queries_in_cache 2 show status like "Qcache_hits"; Variable_name Value Qcache_hits 4 drop table t1; create database if not exists mysqltest; create table mysqltest.t1 (i int not null); create table t1 (i int not null); insert into mysqltest.t1 (i) values (1); insert into t1 (i) values (2); select * from t1; i 2 use mysqltest; select * from t1; i 1 select * from t1; i 1 use test; select * from t1; i 2 show status like "Qcache_queries_in_cache"; Variable_name Value Qcache_queries_in_cache 2 show status like "Qcache_hits"; Variable_name Value Qcache_hits 6 drop database mysqltest; drop table t1; create table t1 (i int not null); insert into t1 (i) values (1),(2),(3),(4); select SQL_CALC_FOUND_ROWS * from t1 limit 2; i 1 2 select FOUND_ROWS(); FOUND_ROWS() 4 show status like "Qcache_hits"; Variable_name Value Qcache_hits 6 show status like "Qcache_queries_in_cache"; Variable_name Value Qcache_queries_in_cache 1 select * from t1 where i=1; i 1 select FOUND_ROWS(); FOUND_ROWS() 1 show status like "Qcache_hits"; Variable_name Value Qcache_hits 6 show status like "Qcache_queries_in_cache"; Variable_name Value Qcache_queries_in_cache 2 select SQL_CALC_FOUND_ROWS * from t1 limit 2; i 1 2 select FOUND_ROWS(); FOUND_ROWS() 4 show status like "Qcache_hits"; Variable_name Value Qcache_hits 7 show status like "Qcache_queries_in_cache"; Variable_name Value Qcache_queries_in_cache 2 select * from t1 where i=1; i 1 select FOUND_ROWS(); FOUND_ROWS() 1 show status like "Qcache_hits"; Variable_name Value Qcache_hits 8 show status like "Qcache_queries_in_cache"; Variable_name Value Qcache_queries_in_cache 2 drop table t1; flush query cache; reset query cache; create table t1 (a int not null) ENGINE=MyISAM; insert into t1 values (1),(2),(3); select * from t1; a 1 2 3 select * from t1; a 1 2 3 show status like "Qcache_queries_in_cache"; Variable_name Value Qcache_queries_in_cache 1 insert delayed into t1 values (4); select a from t1; a 1 2 3 4 show status like "Qcache_queries_in_cache"; Variable_name Value Qcache_queries_in_cache 1 drop table t1; show status like "Qcache_queries_in_cache"; Variable_name Value Qcache_queries_in_cache 0 show global variables like "query_cache_min_res_unit"; Variable_name Value query_cache_min_res_unit 4096 set GLOBAL query_cache_min_res_unit=1001; Warnings: Warning 1292 Truncated incorrect query_cache_min_res_unit value: '1001' show global variables like "query_cache_min_res_unit"; Variable_name Value query_cache_min_res_unit 1000 create table t1 (a int not null); insert into t1 values (1),(2),(3); create table t2 (a int not null); insert into t2 values (1),(2),(3); select * from t1; a 1 2 3 select * from t1; a 1 2 3 select * from t2; a 1 2 3 select * from t2; a 1 2 3 show status like "Qcache_hits"; Variable_name Value Qcache_hits 11 show status like "Qcache_queries_in_cache"; Variable_name Value Qcache_queries_in_cache 2 drop table t1; select a from t2; a 1 2 3 select a from t2; a 1 2 3 show status like "Qcache_hits"; Variable_name Value Qcache_hits 12 show status like "Qcache_queries_in_cache"; Variable_name Value Qcache_queries_in_cache 2 drop table t2; set GLOBAL query_cache_min_res_unit=default; show global variables like "query_cache_min_res_unit"; Variable_name Value query_cache_min_res_unit 4096 create table t1 (a int not null); insert into t1 values (1); select "aaa" from t1; aaa aaa select "AAA" from t1; AAA AAA drop table t1; create table t1 (a int); set GLOBAL query_cache_size=1000; Warnings: Warning 1292 Truncated incorrect query_cache_size value: '1000' show global variables like "query_cache_size"; Variable_name Value query_cache_size 0 select * from t1; a set GLOBAL query_cache_size=1024; Warnings: Warning 1282 Query cache failed to set size 1024; new query cache size is 0 show global variables like "query_cache_size"; Variable_name Value query_cache_size 0 select * from t1; a set GLOBAL query_cache_size=10240; Warnings: Warning 1282 Query cache failed to set size 10240; new query cache size is 0 show global variables like "query_cache_size"; Variable_name Value query_cache_size 0 select * from t1; a set GLOBAL query_cache_size=20480; Warnings: Warning 1282 Query cache failed to set size 20480; new query cache size is 0 show global variables like "query_cache_size"; Variable_name Value query_cache_size 0 select * from t1; a set GLOBAL query_cache_size=40960; Warnings: Warning 1282 Query cache failed to set size 40960; new query cache size is 0 show global variables like "query_cache_size"; Variable_name Value query_cache_size 0 select * from t1; a set GLOBAL query_cache_size=51200; show global variables like "query_cache_size"; Variable_name Value query_cache_size 51200 select * from t1; a set GLOBAL query_cache_size=61440; show global variables like "query_cache_size"; Variable_name Value query_cache_size 61440 select * from t1; a set GLOBAL query_cache_size=81920; show global variables like "query_cache_size"; Variable_name Value query_cache_size 81920 select * from t1; a set GLOBAL query_cache_size=102400; show global variables like "query_cache_size"; Variable_name Value query_cache_size 102400 select * from t1; a drop table t1; set GLOBAL query_cache_size=1048576; create table t1 (i int not null); create table t2 (i int not null); select * from t1; i show status like "Qcache_queries_in_cache"; Variable_name Value Qcache_queries_in_cache 1 create temporary table t3 (i int not null); select * from t2; i show status like "Qcache_queries_in_cache"; Variable_name Value Qcache_queries_in_cache 2 select * from t3; i show status like "Qcache_queries_in_cache"; Variable_name Value Qcache_queries_in_cache 2 update t1 set i=(select distinct 1 from (select * from t2) a); drop table t1, t2, t3; use mysql; select * from db; show status like "Qcache_queries_in_cache"; Variable_name Value Qcache_queries_in_cache 0 use test; select * from mysql.db; show status like "Qcache_queries_in_cache"; Variable_name Value Qcache_queries_in_cache 0 create table t1(id int auto_increment primary key); insert into t1 values (NULL), (NULL), (NULL); select * from t1 where id=2; id 2 alter table t1 rename to t2; select * from t1 where id=2; ERROR 42S02: Table 'test.t1' doesn't exist drop table t2; select * from t1 where id=2; ERROR 42S02: Table 'test.t1' doesn't exist create table t1 (word char(20) not null); select * from t1; word show status like "Qcache_queries_in_cache"; Variable_name Value Qcache_queries_in_cache 1 load data infile 'MYSQLTEST_VARDIR/std_data/words.dat' into table t1; show status like "Qcache_queries_in_cache"; Variable_name Value Qcache_queries_in_cache 0 select count(*) from t1; count(*) 70 drop table t1; create table t1 (a int); insert into t1 values (1),(2),(3); show status like "Qcache_queries_in_cache"; Variable_name Value Qcache_queries_in_cache 0 select * from t1 into outfile "query_cache.out.file"; Warnings: Warning 1287 ' INTO FROM...' instead select * from t1 into outfile "query_cache.out.file"; ERROR HY000: File 'query_cache.out.file' already exists select * from t1 limit 1 into dumpfile "query_cache.dump.file"; Warnings: Warning 1287 ' INTO FROM...' instead show status like "Qcache_queries_in_cache"; Variable_name Value Qcache_queries_in_cache 0 drop table t1; create table t1 (a int); insert into t1 values (1),(2); show status like "Qcache_queries_in_cache"; Variable_name Value Qcache_queries_in_cache 0 select * from t1; a 1 2 SET SQL_SELECT_LIMIT=1; select * from t1; a 1 show status like "Qcache_queries_in_cache"; Variable_name Value Qcache_queries_in_cache 2 SET SQL_SELECT_LIMIT=DEFAULT; drop table t1; flush query cache; reset query cache; flush status; set GLOBAL query_cache_size=1048576; create table t1 (a int not null); insert into t1 values (1),(2),(3); create table t2 (a text not null); create table t3 (a text not null); insert into t3 values("1111111111111111111111111111111111111111111111111111"); insert into t2 select * from t3; insert into t3 select * from t2; insert into t2 select * from t3; insert into t3 select * from t2; insert into t2 select * from t3; insert into t3 select * from t2; insert into t2 select * from t3; insert into t3 select * from t2; insert into t2 select * from t3; insert into t3 select * from t2; drop table t2; create table t2 (a int not null); insert into t2 values (1),(2),(3); create table t4 (a int not null); insert into t4 values (1),(2),(3); select * from t4; select * from t2; select * from t1 as tt, t1 as ttt where tt.a=1 and ttt.a=2; select * from t2; select * from t4; select * from t1 as tt, t1 as ttt where tt.a=1 and ttt.a=2; select * from t2; select * from t4; select * from t1 as tt, t1 as ttt where tt.a=1 and ttt.a=2; delete from t2 where a=1; flush query cache; select * from t3; delete from t4 where a=1; flush query cache; drop table t1,t2,t3,t4; set query_cache_wlock_invalidate=1; create table t1 (a int not null); create table t2 (a int not null); create view v1 as select * from t1; select * from t1; a select * from t2; a show status like "Qcache_queries_in_cache"; Variable_name Value Qcache_queries_in_cache 2 lock table t1 write, t2 read; show status like "Qcache_queries_in_cache"; Variable_name Value Qcache_queries_in_cache 1 unlock table; select * from t1; a show status like "Qcache_queries_in_cache"; Variable_name Value Qcache_queries_in_cache 2 lock table v1 write; show status like "Qcache_queries_in_cache"; Variable_name Value Qcache_queries_in_cache 2 unlock table; drop view v1; drop table t1,t2; set query_cache_wlock_invalidate=default; CREATE TABLE t1 (id INT PRIMARY KEY); insert into t1 values (1),(2),(3); select * from t1; id 1 2 3 create temporary table t1 (a int not null auto_increment primary key); select * from t1; a drop table t1; drop table t1; SET NAMES koi8r; CREATE TABLE t1 (a char(1) character set koi8r); INSERT INTO t1 VALUES (_koi8r'á'),(_koi8r'Á'); SELECT a,'Â','â'='Â' FROM t1; a  'â'='Â' á  1 Á  1 show status like "Qcache_hits"; Variable_name Value Qcache_hits 6 show status like "Qcache_queries_in_cache"; Variable_name Value Qcache_queries_in_cache 1 set collation_connection=koi8r_bin; SELECT a,'Â','â'='Â' FROM t1; a  'â'='Â' á  0 Á  0 show status like "Qcache_hits"; Variable_name Value Qcache_hits 6 show status like "Qcache_queries_in_cache"; Variable_name Value Qcache_queries_in_cache 2 set character_set_client=cp1251; SELECT a,'Â','â'='Â' FROM t1; a ÷ '×'='÷' á ÷ 0 Á ÷ 0 show status like "Qcache_hits"; Variable_name Value Qcache_hits 6 show status like "Qcache_queries_in_cache"; Variable_name Value Qcache_queries_in_cache 3 set character_set_results=cp1251; SELECT a,'Â','â'='Â' FROM t1; a  'â'='Â' À  0 à  0 show status like "Qcache_hits"; Variable_name Value Qcache_hits 6 show status like "Qcache_queries_in_cache"; Variable_name Value Qcache_queries_in_cache 4 SET NAMES default; DROP TABLE t1; CREATE TABLE t1 (a int(1)); CREATE DATABASE mysqltest; USE mysqltest; DROP DATABASE mysqltest; SELECT * FROM test.t1; a USE test; DROP TABLE t1; set character_set_results=null; select @@character_set_results; @@character_set_results NULL set character_set_results=default; set GLOBAL query_cache_size=1355776; create table t1 (id int auto_increment primary key, c char(65)); insert into t1 set c = repeat('x',24); insert into t1 set c = concat(repeat('x',64),'x'); insert into t1 set c = concat(repeat('x',64),'w'); insert into t1 set c = concat(repeat('x',64),'y'); set max_sort_length=200; select c from t1 order by c, id; c xxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxw xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxy reset query cache; set max_sort_length=64; select c from t1 order by c, id; c xxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxw xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxy set max_sort_length=200; select c from t1 order by c, id; c xxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxw xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxy set max_sort_length=default; select '1' || '3' from t1; '1' || '3' 1 1 1 1 set SQL_MODE=oracle; select '1' || '3' from t1; '1' || '3' 13 13 13 13 set SQL_MODE=default; drop table t1; create table t1 (a varchar(20), b int); insert into t1 values ('12345678901234567890', 1); set group_concat_max_len=10; select group_concat(a) FROM t1 group by b; group_concat(a) 1234567890 Warnings: Warning 1260 Row 1 was cut by GROUP_CONCAT() set group_concat_max_len=1024; select group_concat(a) FROM t1 group by b; group_concat(a) 12345678901234567890 set group_concat_max_len=default; drop table t1; create table t1 (a int); show status like "Qcache_queries_in_cache"; Variable_name Value Qcache_queries_in_cache 0 show status like "Qcache_inserts"; Variable_name Value Qcache_inserts 19 show status like "Qcache_hits"; Variable_name Value Qcache_hits 6 /**/ select * from t1; a /**/ select * from t1; a show status like "Qcache_queries_in_cache"; Variable_name Value Qcache_queries_in_cache 1 show status like "Qcache_inserts"; Variable_name Value Qcache_inserts 20 show status like "Qcache_hits"; Variable_name Value Qcache_hits 7 DROP TABLE t1; SET GLOBAL query_cache_size=0; SET SESSION query_cache_type = 2; create table t1(a int); select table_name from information_schema.tables where table_schema="test"; table_name t1 drop table t1; select table_name from information_schema.tables where table_schema="test"; table_name SET SESSION query_cache_type = 1; set global query_cache_size=1024*1024; flush query cache; create table t1 ( a int ); insert into t1 values (1); select a from t1; a 1 select a from t1; a 1 show status like 'qcache_queries_in_cache'; Variable_name Value Qcache_queries_in_cache 1 repair table t1; Table Op Msg_type Msg_text test.t1 repair status OK show status like 'qcache_queries_in_cache'; Variable_name Value Qcache_queries_in_cache 0 drop table t1; set GLOBAL query_cache_size=64*1024; create table t1 (a text); insert into t1 values (repeat('abcdefghijklmnopqrstuvwxyz', 550)); create table t2 (a text); insert into t2 values (repeat('ijklmnopqrstuvwxyzabcdefgh', 550)); select a from t1; select a from t2; show status like 'Qcache_%_blocks'; Variable_name Value Qcache_free_blocks 1 Qcache_total_blocks 7 insert into t1 select reverse(a) from t1; show status like 'Qcache_%_blocks'; Variable_name Value Qcache_free_blocks 2 Qcache_total_blocks 5 select a from t1; show status like 'Qcache_%_blocks'; Variable_name Value Qcache_free_blocks 1 Qcache_total_blocks 8 select a from t1; a 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flush query cache; drop table t1, t2; set GLOBAL query_cache_size=1355776; flush status; CREATE TABLE t1 ( `date` datetime NOT NULL default '0000-00-00 00:00:00', KEY `date` (`date`) ) ENGINE=MyISAM; INSERT INTO t1 VALUES ('20050326'); INSERT INTO t1 VALUES ('20050325'); SELECT COUNT(*) FROM t1 WHERE date BETWEEN '20050326' AND '20050327 invalid'; COUNT(*) 1 Warnings: Warning 1292 Truncated incorrect date value: '20050327 invalid' SELECT COUNT(*) FROM t1 WHERE date BETWEEN '20050326' AND '20050328 invalid'; COUNT(*) 1 Warnings: Warning 1292 Truncated incorrect date value: '20050328 invalid' SELECT COUNT(*) FROM t1 WHERE date BETWEEN '20050326' AND '20050327 invalid'; COUNT(*) 1 Warnings: Warning 1292 Truncated incorrect date value: '20050327 invalid' show status like "Qcache_queries_in_cache"; Variable_name Value Qcache_queries_in_cache 0 show status like "Qcache_inserts"; Variable_name Value Qcache_inserts 0 show status like "Qcache_hits"; Variable_name Value Qcache_hits 0 drop table t1; create table t1 (a int); insert into t1 values (1); reset query cache; flush status; select * from (select * from t1) a; a 1 show status like "Qcache_queries_in_cache"; Variable_name Value Qcache_queries_in_cache 1 show status like "Qcache_inserts"; Variable_name Value Qcache_inserts 1 show status like "Qcache_hits"; Variable_name Value Qcache_hits 0 select * from (select * from t1) a; a 1 show status like "Qcache_queries_in_cache"; Variable_name Value Qcache_queries_in_cache 1 show status like "Qcache_inserts"; Variable_name Value Qcache_inserts 1 show status like "Qcache_hits"; Variable_name Value Qcache_hits 1 insert into t1 values (2); show status like "Qcache_queries_in_cache"; Variable_name Value Qcache_queries_in_cache 0 show status like "Qcache_inserts"; Variable_name Value Qcache_inserts 1 show status like "Qcache_hits"; Variable_name Value Qcache_hits 1 select * from (select * from t1) a; a 1 2 show status like "Qcache_queries_in_cache"; Variable_name Value Qcache_queries_in_cache 1 show status like "Qcache_inserts"; Variable_name Value Qcache_inserts 2 show status like "Qcache_hits"; Variable_name Value Qcache_hits 1 drop table t1; create table t1 (a int); flush status; (select a from t1) union (select a from t1); a show status like "Qcache_queries_in_cache"; Variable_name Value Qcache_queries_in_cache 1 show status like "Qcache_inserts"; Variable_name Value Qcache_inserts 1 show status like "Qcache_hits"; Variable_name Value Qcache_hits 0 (select a from t1) union (select a from t1); a show status like "Qcache_queries_in_cache"; Variable_name Value Qcache_queries_in_cache 1 show status like "Qcache_inserts"; Variable_name Value Qcache_inserts 1 show status like "Qcache_hits"; Variable_name Value Qcache_hits 1 set query_cache_strip_comments=1; (select a from t1) union (select a from t1); a (select a from t1) /* */union (select a from t1); a set query_cache_strip_comments=0; (select a from t1) union (select a from t1); a show status like "Qcache_queries_in_cache"; Variable_name Value Qcache_queries_in_cache 1 show status like "Qcache_inserts"; Variable_name Value Qcache_inserts 1 show status like "Qcache_hits"; Variable_name Value Qcache_hits 4 drop table t1; create table t1 (a int); insert into t1 values (1),(2); drop procedure if exists p1; CREATE PROCEDURE `p1`() begin Declare c1 cursor for select a from t1; open c1; select * from t1; end// call p1()// a 1 2 drop procedure p1// create function f1() returns int begin Declare var1 int; select max(a) from t1 into var1; return var1; end// Warnings: Warning 1287 ' INTO FROM...' instead create procedure `p1`() begin select a, f1() from t1; end// SET @old_log_bin_trust_function_creators= @@global.log_bin_trust_function_creators// SET GLOBAL log_bin_trust_function_creators = 1// call p1()// a f1() 1 2 2 2 SET GLOBAL log_bin_trust_function_creators = @old_log_bin_trust_function_creators// drop procedure p1// drop function f1// drop table t1// flush query cache; reset query cache; flush status; create table t1 (s1 int)// create procedure f1 () begin select sql_cache * from t1; select sql_cache * from t1; select sql_cache * from t1; end;// create procedure f2 () begin select sql_cache * from t1 where s1=1; select sql_cache * from t1; end;// create procedure f3 () begin select sql_cache * from t1; select sql_cache * from t1 where s1=1; end;// create procedure f4 () begin select sql_cache * from t1; select sql_cache * from t1 where s1=1; select sql_cache * from t1; select sql_cache * from t1 where s1=1; select sql_cache * from t1 where s1=1; end;// call f1(); s1 s1 s1 call f1(); s1 s1 s1 call f1(); s1 s1 s1 select sql_cache * from t1; s1 insert into t1 values (1); select sql_cache * from t1; s1 1 call f1(); s1 1 s1 1 s1 1 call f1(); s1 1 s1 1 s1 1 select sql_cache * from t1; s1 1 flush query cache; reset query cache; flush status; select sql_cache * from t1; s1 1 select sql_cache * from t1 where s1=1; s1 1 call f1(); s1 1 s1 1 s1 1 call f2(); s1 1 s1 1 call f3(); s1 1 s1 1 call f4(); s1 1 s1 1 s1 1 s1 1 s1 1 call f4(); s1 1 s1 1 s1 1 s1 1 s1 1 call f3(); s1 1 s1 1 call f2(); s1 1 s1 1 select sql_cache * from t1 where s1=1; s1 1 insert into t1 values (2); call f1(); s1 1 2 s1 1 2 s1 1 2 select sql_cache * from t1 where s1=1; s1 1 select sql_cache * from t1; s1 1 2 call f1(); s1 1 2 s1 1 2 s1 1 2 call f3(); s1 1 2 s1 1 call f3(); s1 1 2 s1 1 call f1(); s1 1 2 s1 1 2 s1 1 2 drop procedure f1; drop procedure f2; drop procedure f3; drop procedure f4; drop table t1; set GLOBAL query_cache_size=0; End of 4.1 tests SET GLOBAL query_cache_size=102400; create table t1(a int); insert into t1 values(0), (1), (4), (5); select * from t1 where a > 3; a 4 5 select * from t1 where a > 3; a 4 5 show status like 'last_query_cost'; Variable_name Value Last_query_cost 0.000000 drop table t1; SET GLOBAL query_cache_size=0; set global query_cache_size=1024*1024; flush status; create table t1 (a int); insert into t1 (a) values (1), (2), (3); select * from t1; a 1 2 3 show status like 'Qcache_hits'; Variable_name Value Qcache_hits 0 select * from t1; a 1 2 3 show status like 'Qcache_hits'; Variable_name Value Qcache_hits 1 create table t2 like t1; select * from t1; a 1 2 3 show status like 'Qcache_hits'; Variable_name Value Qcache_hits 2 insert into t2 select * from t1; select * from t1; a 1 2 3 show status like 'Qcache_hits'; Variable_name Value Qcache_hits 3 drop table t1, t2; create table t1(c1 int); create table t2(c1 int); create table t3(c1 int); create view v1 as select t3.c1 as c1 from t3,t2 where t3.c1 = t2.c1; start transaction; insert into t1(c1) select c1 from v1; drop table t1, t2, t3; drop view v1; create table t1(c1 int); insert into t1 values(1),(10),(100); select * from t1; c1 1 10 100 select * from t1; c1 1 10 100 select * from t1; c1 1 10 100 select * from t1; c1 1 10 100 drop table t1; set global query_cache_size=0; create table t1 (a int); insert into t1 values (1),(2),(3); set GLOBAL query_cache_type=1; set GLOBAL query_cache_limit=10240; set GLOBAL query_cache_min_res_unit=0; set GLOBAL query_cache_size= 102400; reset query cache; set LOCAL default_week_format = 0; select week('2007-01-04'); week('2007-01-04') 0 select week('2007-01-04') from t1; week('2007-01-04') 0 0 0 select extract(WEEK FROM '2007-01-04') from t1; extract(WEEK FROM '2007-01-04') 0 0 0 set LOCAL default_week_format = 2; select week('2007-01-04'); week('2007-01-04') 53 select week('2007-01-04') from t1; week('2007-01-04') 53 53 53 select extract(WEEK FROM '2007-01-04') from t1; extract(WEEK FROM '2007-01-04') 53 53 53 reset query cache; set LOCAL div_precision_increment=2; select 1/7; 1/7 0.14 select 1/7 from t1; 1/7 0.14 0.14 0.14 set LOCAL div_precision_increment=4; select 1/7; 1/7 0.1429 select 1/7 from t1; 1/7 0.1429 0.1429 0.1429 drop table t1; CREATE TABLE t1 (a VARCHAR(200), b TEXT, FULLTEXT (a,b)); INSERT INTO t1 VALUES('MySQL has now support', 'for full-text search'), ('Full-text indexes', 'are called collections'), ('Only MyISAM tables','support collections'), ('Function MATCH ... AGAINST()','is used to do a search'), ('Full-text search in MySQL', 'implements vector space model'); set GLOBAL ft_boolean_syntax='+ -><()~*:""&|'; select *, MATCH(a,b) AGAINST("+called +collections" IN BOOLEAN MODE) as x from t1; a b x MySQL has now support for full-text search 0 Full-text indexes are called collections 1 Only MyISAM tables support collections 0 Function MATCH ... AGAINST() is used to do a search 0 Full-text search in MySQL implements vector space model 0 set GLOBAL ft_boolean_syntax='- +><()~*:""&|'; select *, MATCH(a,b) AGAINST("+called +collections" IN BOOLEAN MODE) as x from t1; a b x MySQL has now support for full-text search 0 Full-text indexes are called collections 0 Only MyISAM tables support collections 0 Function MATCH ... AGAINST() is used to do a search 0 Full-text search in MySQL implements vector space model 0 create function change_global() returns integer deterministic begin set global ft_boolean_syntax='+ -><()~*:""&|'; return 1; end| select *, change_global() from t1; a b change_global() MySQL has now support for full-text search 1 Full-text indexes are called collections 1 Only MyISAM tables support collections 1 Function MATCH ... AGAINST() is used to do a search 1 Full-text search in MySQL implements vector space model 1 drop function change_global; drop table t1; set GLOBAL query_cache_type=default; set GLOBAL query_cache_limit=default; set GLOBAL query_cache_min_res_unit=default; set GLOBAL query_cache_size= default; set GLOBAL query_cache_size=1024000; create table t1 (a char); insert into t1 values ('c'); a drop table t1; set GLOBAL query_cache_size= default; SET GLOBAL query_cache_size=64*1024*1024; CREATE TABLE t1 (id INT); CREATE PROCEDURE proc29856(IN theUPC TEXT) BEGIN SET @stmtStr := ''; SELECT CONCAT("SELECT id FROM t1 WHERE id IN (",theUPC,")") INTO @stmtStr; PREPARE stmt FROM @stmtStr; EXECUTE stmt; END | CALL proc29856('1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24, 25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50, 51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76, 77,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,96,97,98,99,100,101, 102,103,104,105,106,107,108,109,110,111,112,113,114,115,116,117,118,119,120, 121,122,123,124,125,126,127,128,129,130,131,132,133,134,135,136,137,138,139, 140,141,142,143,144,145,146,147,148,149,150,151,152,153,154,155,156,157,158, 159,160,161,162,163,164,165,166,167,168,169,170,171,172,173,174,175,176,177, 178,179,180,181,182,183,184,185,186,187,188,189,190,191,192,193,194,195,196, 197,198,199,200,201,202,203,204,205,206,207,208,209,210,211,212,213,214,215, 216,217,218,219,220,221,222,223,224,225,226,227,228,229,230,231,232,233,234, 235,236,237,238,239,240,241,242,243,244,245,246,247,248,249,250,251,252,253, 254,255,256,257,258,259,260,261,262,263,264,265,266,267,268,269,270,271,272, 273,274,275,276,277,278,279,280,281,282,283,284,285,286,287,288,289,290,291, 292,293,294,295,296,297,298,299,300,301,302,303,304,305,306,307,308,309,310, 311,312,313,314,315,316,317,318,319,320,321,322,323,324,325,326,327,328,329, 330,331,332,333,334,335,336,337,338,339,340,341,342,343,344,345,346,347,348, 349,350,351,352,353,354,355,356,357,358,359,360,361,362,363,364,365,366,367, 368,369,370,371,372,373,374,375,376,377,378,379,380,381,382,383,384,385,386, 387,388,389,390,391,392,393,394,395,396,397,398,399,400,401,402,403,404,405, 406,407,408,409,410,411,412,413,414,415,416,417,418,419,420,421,422,423,424, 425,426,427,428,429,430,431,432,433,434,435,436,437,438,439,440,441,442,443, 444,445,446,447,448,449,450,451,452,453,454,455,456,457,458,459,460,461,462, 463,464,465,466,467,468,469,470,471,472,473,474,475,476,477,478,479,480,481, 482,483,484,485,486,487,488,489,490,491,492,493,494,495,496,497,498,499,500, 501,502,503,504,505,506,507,508,509,510,511,512,513,514,515,516,517,518,519, 520,521,522,523,524,525,526,527,528,529,530,531,532,533,534,535,536,537,538, 539,540,541,542,543,544,545,546,547,548,549,550,551,552,553,554,555,556,557, 558,559,560,561,562,563,564,565,566,567,568,569,570,571,572,573,574,575,576, 577,578,579,580,581,582,583,584,585,586,587,588,589,590,591,592,593,594,595, 596,597,598,599,600,601,602,603,604,605,606,607,608,609,610,611,612,613,614, 615,616,617,618,619,620,621,622,623,624,625,626,627,628,629,630,631,632,633, 634,635,636,637,638,639,640,641,642,643,644,645,646,647,648,649,650,651,652, 653,654,655,656,657,658,659,660,661,662,663,664,665,666,667,668,669,670,671, 672,673,674,675,676,677,678,679,680,681,682,683,684,685,686,687,688,689,690, 691,692,693,694,695,696,697,698,699,700,701,702,703,704,705,706,707,708,709, 710,711,712,713,714,715,716,717,718,719,720,721,722,723,724,725,726,727,728, 729,730,731,732,733,734,735,736,737,738,739,740,741,742,743,744,745,746,747, 748,749,750,751,752,753,754,755,756,757,758,759,760,761,762,763,764,765,766, 767,768,769,770,771,772,773,774,775,776,777,778,779,780,781,782,783,784,785, 786,787,788,789,790,791,792,793,794,795,796,797,798,799,800,801,802,803,804, 805,806,807,808,809,810,811,812,813,814,815,816,817,818,819,820,821,822,823, 824,825,826,827,828,829,830,831,832,833,834,835,836,837,838,839,840,841,842, 843,844,845,846,847,848,849,850,851,852,853,854,855,856,857,858,859,860,861, 862,863,864,865,866,867,868,869,870,871,872,873,874,875,876,877,878,879,880, 881,882,883,884,885,886,887,888,889,890,891,892,893,894,895,896,897,898,899, 900,901,902,903,904,905,906,907,908,909,910,911,912,913,914,915,916,917,918, 919,920,921,922,923,924,925,926,927,928,929,930,931,932,933,934,935,936,937, 938,939,940,941,942,943,944,945,946,947,948,949,950,951,952,953,954,955,956, 957,958,959,960,961,962,963,964,965,966,967,968,969,970,971,972,973,974,975, 976,977,978,979,980,981,982,983,984,985,986,987,988,989,990,991,992,993,994, 995,996,997,998,999,1000,1001,1002,1003,1004,1005,1006,1007,1008,1009,1010, 1011,1012,1013,1014,1015,1016,1017,1018,1019,1020,1021,1022,1023,1024,1025, 1026,1027,1028,1029,1030,1031,1032,1033,1034,1035,1036,1037,1038,1039,1040, 1041,1042,1043,1044,1045,1046,1047,1048,1049,1050,1051,1052,1053,1054,1055, 1056,1057,1058,1059,1060,1061,1062,1063,1064,1065,1066,1067,1068,1069,1070, 1071,1072,1073,1074,1075,1076,1077,1078,1079,1080,1081,1082,1083,1084,1085, 1086,1087,1088,1089,1090,1091,1092,1093,1094,1095,1096,1097,1098,1099,1100, 1101,1102,1103,1104,1105,1106,1107,1108,1109,1110,1111,1112,1113,1114,1115, 1116,1117,1118,1119,1120,1121,1122,1123,1124,1125,1126,1127,1128,1129,1130, 1131,1132,1133,1134,1135,1136,1137,1138,1139,1140,1141,1142,1143,1144,1145, 1146,1147,1148,1149,1150,1151,1152,1153,1154,1155,1156,1157,1158,1159,1160, 1161,1162,1163,1164,1165,1166,1167,1168,1169,1170,1171,1172,1173,1174,1175, 1176,1177,1178,1179,1180,1181,1182,1183,1184,1185,1186,1187,1188,1189,1190, 1191,1192,1193,1194,1195,1196,1197,1198,1199,1200,1201,1202,1203,1204,1205, 1206,1207,1208,1209,1210,1211,1212,1213,1214,1215,1216,1217,1218,1219,1220, 1221,1222,1223,1224,1225,1226,1227,1228,1229,1230,1231,1232,1233,1234,1235, 1236,1237,1238,1239,1240,1241,1242,1243,1244,1245,1246,1247,1248,1249,1250, 1251,1252,1253,1254,1255,1256,1257,1258,1259,1260,1261,1262,1263,1264,1265, 1266,1267,1268,1269,1270,1271,1272,1273,1274,1275,1276,1277,1278,1279,1280, 1281,1282,1283,1284,1285,1286,1287,1288,1289,1290,1291,1292,1293,1294,1295, 1296,1297,1298,1299,1300,1301,1302,1303,1304,1305,1306,1307,1308,1309,1310, 1311,1312,1313,1314,1315,1316,1317,1318,1319,1320,1321,1322,1323,1324,1325, 1326,1327,1328,1329,1330,1331,1332,1333,1334,1335,1336,1337,1338,1339,1340, 1341,1342,1343,1344,1345,1346,1347,1348,1349,1350,1351,1352,1353,1354,1355, 1356,1357,1358,1359,1360,1361,1362,1363,1364,1365,1366,1367,1368,1369,1370, 1371,1372,1373,1374,1375,1376,1377,1378,1379,1380,1381,1382,1383,1384,1385, 1386,1387,1388,1389,1390,1391,1392,1393,1394,1395,1396,1397,1398,1399,1400, 1401,1402,1403,1404,1405,1406,1407,1408,1409,1410,1411,1412,1413,1414,1415, 1416,1417,1418,1419,1420,1421,1422,1423,1424,1425,1426,1427,1428,1429,1430, 1431,1432,1433,1434,1435,1436,1437,1438,1439,1440,1441,1442,1443,1444,1445, 1446,1447,1448,1449,1450,1451,1452,1453,1454,1455,1456,1457,1458,1459,1460, 1461,1462,1463,1464,1465,1466,1467,1468,1469,1470,1471,1472,1473,1474,1475, 1476,1477,1478,1479,1480,1481,1482,1483,1484,1485,1486,1487,1488,1489,1490, 1491,1492,1493,1494,1495,1496,1497,1498,1499,1500,1501,1502,1503,1504,1505, 1506,1507,1508,1509,1510,1511,1512,1513,1514,1515,1516,1517,1518,1519,1520, 1521,1522,1523,1524,1525,1526,1527,1528,1529,1530,1531,1532,1533,1534,1535, 1536,1537,1538,1539,1540,1541,1542,1543,1544,1545,1546,1547,1548,1549,1550, 1551,1552,1553,1554,1555,1556,1557,1558,1559,1560,1561,1562,1563,1564,1565, 1566,1567,1568,1569,1570,1571,1572,1573,1574,1575,1576,1577,1578,1579,1580, 1581,1582,1583,1584,1585,1586,1587,1588,1589,1590,1591,1592,1593,1594,1595, 1596,1597,1598,1599,1600,1601,1602,1603,1604,1605,1606,1607,1608,1609,1610, 1611,1612,1613,1614,1615,1616,1617,1618,1619,1620,1621,1622,1623,1624,1625, 1626,1627,1628,1629,1630,1631,1632,1633,1634,1635,1636,1637,1638,1639,1640, 1641,1642,1643,1644,1645,1646,1647,1648,1649,1650,1651,1652,1653,1654,1655, 1656,1657,1658,1659,1660,1661,1662,1663,1664,1665,1666,1667,1668,1669,1670, 1671,1672,1673,1674,1675,1676,1677,1678,1679,1680,1681,1682,1683,1684,1685, 1686,1687,1688,1689,1690,1691,1692,1693,1694,1695,1696,1697,1698,1699,1700, 1701,1702,1703,1704,1705,1706,1707,1708,1709,1710,1711,1712,1713,1714,1715, 1716,1717,1718,1719,1720,1721,1722,1723,1724,1725,1726,1727,1728,1729,1730, 1731,1732,1733,1734,1735,1736,1737,1738,1739,1740,1741,1742,1743,1744,1745, 1746,1747,1748,1749,1750,1751,1752,1753,1754,1755,1756,1757,1758,1759,1760, 1761,1762,1763,1764,1765,1766,1767,1768,1769,1770,1771,1772,1773,1774,1775, 1776,1777,1778,1779,1780,1781,1782,1783,1784,1785,1786,1787,1788,1789,1790, 1791,1792,1793,1794,1795,1796,1797,1798,1799,1800,1801,1802,1803,1804,1805, 1806,1807,1808,1809,1810,1811'); id DROP PROCEDURE proc29856; DROP TABLE t1; SET GLOBAL query_cache_size= default; # # Bug#25132 disabled query cache: Qcache_free_blocks = 1 # set global query_cache_size=102400; set global query_cache_size=0; set global query_cache_type=0; show status like 'Qcache_free_blocks'; Variable_name Value Qcache_free_blocks 0 set global query_cache_size=102400; show status like 'Qcache_free_blocks'; Variable_name Value Qcache_free_blocks 1 set global query_cache_type=on; set session query_cache_type=on; Restore default values. drop database if exists db1; drop database if exists db2; set GLOBAL query_cache_size=15*1024*1024; create database db1; use db1; create table t1(c1 int)engine=myisam; insert into t1(c1) values (1); select * from db1.t1 f; c1 1 show status like 'Qcache_queries_in_cache'; Variable_name Value Qcache_queries_in_cache 1 create database db2; rename table db1.t1 to db2.t2; drop database db1; show status like 'Qcache_queries_in_cache'; Variable_name Value Qcache_queries_in_cache 0 drop database db2; set global query_cache_size=@save_query_cache_size; drop database if exists db1; drop database if exists db3; set GLOBAL query_cache_size=15*1024*1024; create database db1; create database db3; use db1; create table t1(c1 int) engine=myisam; use db3; create table t1(c1 int) engine=myisam; use db1; insert into t1(c1) values (1); use test; select * from db1.t1; c1 1 select c1+1 from db1.t1; c1+1 2 select * from db3.t1; c1 show status like 'Qcache_queries_in_cache'; Variable_name Value Qcache_queries_in_cache 3 create database db2; rename table db1.t1 to db2.t2; drop database db1; show status like 'Qcache_queries_in_cache'; Variable_name Value Qcache_queries_in_cache 1 drop database db2; drop database db3; set GLOBAL query_cache_type=default; set GLOBAL query_cache_limit=default; set GLOBAL query_cache_min_res_unit=default; set GLOBAL query_cache_size=@save_query_cache_size; set local query_cache_type=default; set GLOBAL query_cache_type=on; set local query_cache_type=on; FLUSH STATUS; SET GLOBAL query_cache_size=10*1024*1024; SET @save_concurrent_insert= @@concurrent_insert; SET GLOBAL concurrent_insert= 0; CREATE TABLE t1 (c1 INT NOT NULL) ENGINE=MyISAM; INSERT INTO t1 (c1) VALUES (1), (2); SHOW GLOBAL VARIABLES LIKE 'concurrent_insert'; Variable_name Value concurrent_insert NEVER SHOW STATUS LIKE 'Qcache_hits'; Variable_name Value Qcache_hits 0 SELECT * FROM t1; c1 1 2 SELECT * FROM t1; c1 1 2 SHOW STATUS LIKE 'Qcache_hits'; Variable_name Value Qcache_hits 1 DROP TABLE t1; SET GLOBAL concurrent_insert= @save_concurrent_insert; SET GLOBAL query_cache_size= default; DROP TABLE IF EXISTS t1; FLUSH STATUS; SET GLOBAL query_cache_size=1048576; CREATE TABLE t1 (a INT); INSERT INTO t1 VALUES (1),(2),(3),(4),(5); SHOW STATUS LIKE 'Qcache_queries_in_cache'; Variable_name Value Qcache_queries_in_cache 0 SELECT * FROM t1; a 1 2 3 4 5 BEGIN; SELECT * FROM t1; a 1 2 3 4 5 COMMIT; SHOW STATUS LIKE 'Qcache_queries_in_cache'; Variable_name Value Qcache_queries_in_cache 2 SHOW STATUS LIKE "Qcache_hits"; Variable_name Value Qcache_hits 0 SELECT * FROM t1; a 1 2 3 4 5 BEGIN; SELECT * FROM t1; a 1 2 3 4 5 COMMIT; SHOW STATUS LIKE "Qcache_hits"; Variable_name Value Qcache_hits 2 DROP TABLE t1; SET GLOBAL query_cache_size= default; #------------------------------------------------------------------------ # Tests for Bug#6760 and Bug#12689 SET @row_count = 4; SET @sleep_time_per_result_row = 1; SET @max_acceptable_delay = 2; SET @@global.query_cache_size = 1024 * 64; DROP TEMPORARY TABLE IF EXISTS t_history; DROP TABLE IF EXISTS t1; CREATE TEMPORARY TABLE t_history (attempt SMALLINT, start_ts DATETIME, end_ts DATETIME, start_cached INTEGER, end_cached INTEGER); CREATE TABLE t1 (f1 BIGINT); INSERT INTO t_history SET attempt = 4 - 4 + 1, start_ts = NOW(), start_cached = 0; SELECT *, SLEEP(@sleep_time_per_result_row) FROM t1; f1 SLEEP(@sleep_time_per_result_row) 1 0 1 0 1 0 1 0 UPDATE t_history SET end_ts = NOW() WHERE attempt = 4 - 4 + 1; UPDATE t_history SET end_cached = 0 WHERE attempt = 4 - 4 + 1; INSERT INTO t_history SET attempt = 4 - 3 + 1, start_ts = NOW(), start_cached = 0; SELECT *, SLEEP(@sleep_time_per_result_row) FROM t1; f1 SLEEP(@sleep_time_per_result_row) 1 0 1 0 1 0 1 0 UPDATE t_history SET end_ts = NOW() WHERE attempt = 4 - 3 + 1; UPDATE t_history SET end_cached = 0 WHERE attempt = 4 - 3 + 1; INSERT INTO t_history SET attempt = 4 - 2 + 1, start_ts = NOW(), start_cached = 0; SELECT *, SLEEP(@sleep_time_per_result_row) FROM t1; f1 SLEEP(@sleep_time_per_result_row) 1 0 1 0 1 0 1 0 UPDATE t_history SET end_ts = NOW() WHERE attempt = 4 - 2 + 1; UPDATE t_history SET end_cached = 0 WHERE attempt = 4 - 2 + 1; INSERT INTO t_history SET attempt = 4 - 1 + 1, start_ts = NOW(), start_cached = 0; SELECT *, SLEEP(@sleep_time_per_result_row) FROM t1; f1 SLEEP(@sleep_time_per_result_row) 1 0 1 0 1 0 1 0 UPDATE t_history SET end_ts = NOW() WHERE attempt = 4 - 1 + 1; UPDATE t_history SET end_cached = 0 WHERE attempt = 4 - 1 + 1; # Test 1: Does the query with SLEEP need a reasonable time? SELECT COUNT(*) >= 4 - 1 INTO @aux1 FROM t_history WHERE TIMEDIFF(end_ts,start_ts) - @sleep_time_per_result_row * @row_count BETWEEN 0 AND @max_acceptable_delay; SELECT @aux1 AS "Expect 1"; Expect 1 1 # Test 2: Does the query with SLEEP need a reasonable time even in case # of the non first execution? SELECT COUNT(*) >= 4 - 1 - 1 INTO @aux2 FROM t_history WHERE TIMEDIFF(end_ts,start_ts) - @sleep_time_per_result_row * @row_count BETWEEN 0 AND @max_acceptable_delay AND attempt > 1; SELECT @aux2 AS "Expect 1"; Expect 1 1 # Test 3: The query with SLEEP must be not cached. SELECT COUNT(*) = 4 INTO @aux3 FROM t_history WHERE end_cached = start_cached; SELECT @aux3 AS "Expect 1"; Expect 1 1 DROP TABLE t1; DROP TEMPORARY TABLE t_history; SET @@global.query_cache_size = default; End of 5.0 tests SET GLOBAL query_cache_size=1024*1024*512; CREATE TABLE t1 (a ENUM('rainbow')); INSERT INTO t1 VALUES (),(),(),(),(); SELECT 1 FROM t1 GROUP BY (SELECT 1 FROM t1 ORDER BY AVG(LAST_INSERT_ID())); 1 1 DROP TABLE t1; CREATE TABLE t1 (a LONGBLOB); INSERT INTO t1 SET a = 'aaaa'; INSERT INTO t1 SET a = 'aaaa'; SELECT 1 FROM t1 GROUP BY (SELECT LAST_INSERT_ID() FROM t1 ORDER BY MIN(a) ASC LIMIT 1); 1 1 DROP TABLE t1; SET GLOBAL query_cache_size= default; CREATE TABLE t1( a INT ); SET @v = ( SELECT SQL_CACHE 1 ); ERROR 42000: Incorrect usage/placement of 'SQL_CACHE' SET @v = ( SELECT SQL_NO_CACHE 1 ); ERROR 42000: Incorrect usage/placement of 'SQL_NO_CACHE' SELECT a FROM t1 WHERE a IN ( SELECT SQL_CACHE a FROM t1 ); ERROR 42000: Incorrect usage/placement of 'SQL_CACHE' SELECT a FROM t1 WHERE a IN ( SELECT SQL_NO_CACHE a FROM t1 ); ERROR 42000: Incorrect usage/placement of 'SQL_NO_CACHE' SELECT ( SELECT SQL_CACHE a FROM t1 ); ERROR 42000: Incorrect usage/placement of 'SQL_CACHE' SELECT ( SELECT SQL_NO_CACHE a FROM t1 ); ERROR 42000: Incorrect usage/placement of 'SQL_NO_CACHE' SELECT SQL_CACHE * FROM t1; a SELECT SQL_NO_CACHE * FROM t1; a SELECT * FROM t1 UNION SELECT SQL_CACHE * FROM t1; ERROR 42000: Incorrect usage/placement of 'SQL_CACHE' SELECT * FROM t1 UNION SELECT SQL_NO_CACHE * FROM t1; ERROR 42000: Incorrect usage/placement of 'SQL_NO_CACHE' SELECT * FROM t1 WHERE a IN (SELECT SQL_CACHE a FROM t1); ERROR 42000: Incorrect usage/placement of 'SQL_CACHE' SELECT * FROM t1 WHERE a IN (SELECT a FROM t1 UNION SELECT SQL_CACHE a FROM t1); ERROR 42000: Incorrect usage/placement of 'SQL_CACHE' SELECT * FROM t1 UNION SELECT SQL_NO_CACHE * FROM t1; ERROR 42000: Incorrect usage/placement of 'SQL_NO_CACHE' SELECT * FROM t1 WHERE a IN (SELECT SQL_NO_CACHE a FROM t1); ERROR 42000: Incorrect usage/placement of 'SQL_NO_CACHE' SELECT * FROM t1 WHERE a IN (SELECT a FROM t1 UNION SELECT SQL_NO_CACHE a FROM t1); ERROR 42000: Incorrect usage/placement of 'SQL_NO_CACHE' SELECT SQL_CACHE SQL_NO_CACHE * FROM t1; ERROR HY000: Incorrect usage of SQL_NO_CACHE and SQL_CACHE SELECT SQL_NO_CACHE SQL_CACHE * FROM t1; ERROR HY000: Incorrect usage of SQL_NO_CACHE and SQL_CACHE SELECT SQL_CACHE * FROM t1 UNION SELECT SQL_CACHE * FROM t1; ERROR 42000: Incorrect usage/placement of 'SQL_CACHE' SELECT SQL_CACHE * FROM t1 UNION SELECT SQL_NO_CACHE * FROM t1; ERROR 42000: Incorrect usage/placement of 'SQL_NO_CACHE' SELECT SQL_NO_CACHE * FROM t1 UNION SELECT SQL_CACHE * FROM t1; ERROR 42000: Incorrect usage/placement of 'SQL_CACHE' SELECT SQL_NO_CACHE * FROM t1 UNION SELECT SQL_NO_CACHE * FROM t1; ERROR 42000: Incorrect usage/placement of 'SQL_NO_CACHE' SELECT SQL_CACHE * FROM t1 WHERE a IN (SELECT SQL_NO_CACHE a FROM t1); ERROR 42000: Incorrect usage/placement of 'SQL_NO_CACHE' SELECT SQL_CACHE * FROM t1 WHERE a IN (SELECT a FROM t1 UNION SELECT SQL_NO_CACHE a FROM t1); ERROR 42000: Incorrect usage/placement of 'SQL_NO_CACHE' DROP TABLE t1; End of 5.1 tests # # Bug#51336 Assert in reload_acl_and_cache during RESET QUERY CACHE # DROP TABLE IF EXISTS t1; CREATE TABLE t1(id INT); START TRANSACTION; SELECT * FROM t1; id RESET QUERY CACHE; COMMIT; DROP TABLE t1; New query cache switching OFF mechanism test set global query_cache_size=1024*1024*20; set global query_cache_type=on; select @@query_cache_size, @@global.query_cache_type, @@local.query_cache_type; @@query_cache_size @@global.query_cache_type @@local.query_cache_type 20971520 ON ON set global query_cache_size=0; select @@query_cache_size, @@global.query_cache_type, @@local.query_cache_type; @@query_cache_size @@global.query_cache_type @@local.query_cache_type 0 ON ON set global query_cache_size=1024*1024*20; select @@query_cache_size, @@global.query_cache_type, @@local.query_cache_type; @@query_cache_size @@global.query_cache_type @@local.query_cache_type 20971520 ON ON set global query_cache_type=off; select @@query_cache_size, @@global.query_cache_type, @@local.query_cache_type; @@query_cache_size @@global.query_cache_type @@local.query_cache_type 20971520 OFF OFF set global query_cache_type=on; select @@query_cache_size, @@global.query_cache_type, @@local.query_cache_type; @@query_cache_size @@global.query_cache_type @@local.query_cache_type 20971520 ON OFF set local query_cache_type= on; select @@query_cache_size, @@global.query_cache_type, @@local.query_cache_type; @@query_cache_size @@global.query_cache_type @@local.query_cache_type 20971520 ON ON # # MDEV-4981: Account for queries handled by query-cache in # USER_STATISTICS (and in HOST_STATISTICS) # set @save_userstat=@@global.userstat; SET GLOBAL userstat=1; set GLOBAL query_cache_size=1355776; FLUSH USER_STATISTICS; FLUSH CLIENT_STATISTICS; reset query cache; flush status; create table t1 (a int); insert into t1 values (1); select * from t1; a 1 select SELECT_COMMANDS,ROWS_SENT,EMPTY_QUERIES from INFORMATION_SCHEMA.CLIENT_STATISTICS where CLIENT="localhost"; SELECT_COMMANDS ROWS_SENT EMPTY_QUERIES 1 1 0 select SELECT_COMMANDS,ROWS_SENT,EMPTY_QUERIES from INFORMATION_SCHEMA.USER_STATISTICS where USER="root"; SELECT_COMMANDS ROWS_SENT EMPTY_QUERIES 2 2 0 show status like "Qcache_hits"; Variable_name Value Qcache_hits 0 select * from t1; a 1 select * from t1; a 1 select SELECT_COMMANDS,ROWS_SENT,EMPTY_QUERIES from INFORMATION_SCHEMA.CLIENT_STATISTICS where CLIENT="localhost"; SELECT_COMMANDS ROWS_SENT EMPTY_QUERIES 5 5 0 select SELECT_COMMANDS,ROWS_SENT,EMPTY_QUERIES from INFORMATION_SCHEMA.USER_STATISTICS where USER="root"; SELECT_COMMANDS ROWS_SENT EMPTY_QUERIES 6 6 0 show status like "Qcache_hits"; Variable_name Value Qcache_hits 2 drop table t1; FLUSH USER_STATISTICS; FLUSH CLIENT_STATISTICS; flush status; create table t1 (a int); select * from t1; a select SELECT_COMMANDS,ROWS_SENT,EMPTY_QUERIES from INFORMATION_SCHEMA.CLIENT_STATISTICS where CLIENT="localhost"; SELECT_COMMANDS ROWS_SENT EMPTY_QUERIES 1 0 1 select SELECT_COMMANDS,ROWS_SENT,EMPTY_QUERIES from INFORMATION_SCHEMA.USER_STATISTICS where USER="root"; SELECT_COMMANDS ROWS_SENT EMPTY_QUERIES 2 1 1 show status like "Qcache_hits"; Variable_name Value Qcache_hits 0 select * from t1; a select * from t1; a select SELECT_COMMANDS,ROWS_SENT,EMPTY_QUERIES from INFORMATION_SCHEMA.CLIENT_STATISTICS where CLIENT="localhost"; SELECT_COMMANDS ROWS_SENT EMPTY_QUERIES 5 2 3 select SELECT_COMMANDS,ROWS_SENT,EMPTY_QUERIES from INFORMATION_SCHEMA.USER_STATISTICS where USER="root"; SELECT_COMMANDS ROWS_SENT EMPTY_QUERIES 6 3 3 show status like "Qcache_hits"; Variable_name Value Qcache_hits 2 FLUSH USER_STATISTICS; FLUSH CLIENT_STATISTICS; flush status; create procedure p1() select * from t1; call p1; a select SELECT_COMMANDS,ROWS_SENT,EMPTY_QUERIES from INFORMATION_SCHEMA.CLIENT_STATISTICS where CLIENT="localhost"; SELECT_COMMANDS ROWS_SENT EMPTY_QUERIES 1 0 1 select SELECT_COMMANDS,ROWS_SENT,EMPTY_QUERIES from INFORMATION_SCHEMA.USER_STATISTICS where USER="root"; SELECT_COMMANDS ROWS_SENT EMPTY_QUERIES 2 1 1 show status like "Qcache_hits"; Variable_name Value Qcache_hits 0 call p1; a call p1; a select SELECT_COMMANDS,ROWS_SENT,EMPTY_QUERIES from INFORMATION_SCHEMA.CLIENT_STATISTICS where CLIENT="localhost"; SELECT_COMMANDS ROWS_SENT EMPTY_QUERIES 5 2 3 select SELECT_COMMANDS,ROWS_SENT,EMPTY_QUERIES from INFORMATION_SCHEMA.USER_STATISTICS where USER="root"; SELECT_COMMANDS ROWS_SENT EMPTY_QUERIES 6 3 3 show status like "Qcache_hits"; Variable_name Value Qcache_hits 2 FLUSH USER_STATISTICS; FLUSH CLIENT_STATISTICS; flush status; SET GLOBAL query_cache_size= 0; call p1; a select SELECT_COMMANDS,ROWS_SENT,EMPTY_QUERIES from INFORMATION_SCHEMA.CLIENT_STATISTICS where CLIENT="localhost"; SELECT_COMMANDS ROWS_SENT EMPTY_QUERIES 1 0 1 select SELECT_COMMANDS,ROWS_SENT,EMPTY_QUERIES from INFORMATION_SCHEMA.USER_STATISTICS where USER="root"; SELECT_COMMANDS ROWS_SENT EMPTY_QUERIES 2 1 1 show status like "Qcache_hits"; Variable_name Value Qcache_hits 0 call p1; a call p1; a select SELECT_COMMANDS,ROWS_SENT,EMPTY_QUERIES from INFORMATION_SCHEMA.CLIENT_STATISTICS where CLIENT="localhost"; SELECT_COMMANDS ROWS_SENT EMPTY_QUERIES 5 2 3 select SELECT_COMMANDS,ROWS_SENT,EMPTY_QUERIES from INFORMATION_SCHEMA.USER_STATISTICS where USER="root"; SELECT_COMMANDS ROWS_SENT EMPTY_QUERIES 6 3 3 show status like "Qcache_hits"; Variable_name Value Qcache_hits 0 drop procedure p1; drop table t1; set GLOBAL query_cache_size=1355776; SET GLOBAL userstat=@save_userstat; # # MDEV-5924: MariaDB could crash after changing the query_cache size # SET GLOBAL query_cache_size= 50*1024; SET GLOBAL query_cache_type= 1; SET query_cache_type= 1; CREATE TABLE t1 (pk INT); CREATE VIEW v1 AS SELECT * FROM t1; SELECT * FROM v1 WHERE pk IN 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pk DROP VIEW v1; DROP TABLE t1; End of 5.5 tests # # Bug#12977203: SERVER CRASH ON A DERIVED TABLE WITH QUERY CACHE ENABLED # SET @qc= @@query_cache_size; SET GLOBAL query_cache_size=1355776; CREATE TABLE t1 (f1 blob); SELECT COUNT(*) FROM (SELECT * FROM t1 ) tt; COUNT(*) 0 DROP TABLE t1; SET GLOBAL query_cache_size= @qc; # # MDEV-617 LP:671189 - Query cache is not used for tables or # databases with dots in their names # CREATE DATABASE `foo.bar`; use `foo.bar`; flush status; CREATE TABLE moocow (a int); INSERT INTO moocow VALUES (1), (2), (3); SHOW STATUS LIKE 'Qcache_inserts'; Variable_name Value Qcache_inserts 0 SELECT * FROM moocow; a 1 2 3 SHOW STATUS LIKE 'Qcache_inserts'; Variable_name Value Qcache_inserts 1 SHOW STATUS LIKE 'Qcache_hits'; Variable_name Value Qcache_hits 0 SELECT * FROM moocow; a 1 2 3 SHOW STATUS LIKE 'Qcache_hits'; Variable_name Value Qcache_hits 1 use test; drop database `foo.bar`; End of 10.0 tests # # MDEV-10766 Queries which start with WITH clause do not get # inserted into query cache # flush status; show status like "Qcache_inserts"; Variable_name Value Qcache_inserts 0 create table t1 (i int); with cte as (select * from t1) select * from cte; i show status like "Qcache_queries_in_cache"; Variable_name Value Qcache_queries_in_cache 1 show status like "Qcache_inserts"; Variable_name Value Qcache_inserts 1 show status like "Qcache_hits"; Variable_name Value Qcache_hits 0 with cte as (select * from t1) select * from cte; i show status like "Qcache_queries_in_cache"; Variable_name Value Qcache_queries_in_cache 1 show status like "Qcache_inserts"; Variable_name Value Qcache_inserts 1 show status like "Qcache_hits"; Variable_name Value Qcache_hits 1 drop table t1; # # MDEV-15328: MariaDB 10.2.13 Crashes upon CALL PROCEDURE PARAM # LAST_INSERT_ID () # (part 2, part 1 is in sp.test) # create table t1 (a int); insert into t1 values (1); CREATE FUNCTION foo (i INT UNSIGNED ) RETURNS int deterministic RETURN 1; show status like "Qcache_queries_in_cache"; Variable_name Value Qcache_queries_in_cache 0 SELECT foo( LAST_INSERT_ID() ) from t1; foo( LAST_INSERT_ID() ) 1 show status like "Qcache_queries_in_cache"; Variable_name Value Qcache_queries_in_cache 0 DROP FUNCTION foo; drop table t1; # # MDEV-24858 SIGABRT in DbugExit from my_malloc in Query_cache::init_cache Regression # SET @qc= @@query_cache_size; set global Query_cache_size=18446744073709547520; SET GLOBAL query_cache_size= @qc; # # MDEV-22301 JSON_TABLE: Queries are not inserted into query cache. # create table t1 (a text); insert into t1 values ('{"a":"foo"}'); flush status; SHOW STATUS LIKE 'Qcache_inserts'; Variable_name Value Qcache_inserts 0 select * from t1, json_table(t1.a, '$' columns (f varchar(20) path '$.a')) as jt; a f {"a":"foo"} foo SHOW STATUS LIKE 'Qcache_inserts'; Variable_name Value Qcache_inserts 1 drop table t1; # # MDEV-25228 JSON_TABLE: Server crashes in Query_cache::unlink_table. # CREATE TABLE t (a INT); SELECT * FROM t JOIN JSON_TABLE('{}' , '$' COLUMNS(b FOR ORDINALITY)) AS jt; a b DROP TABLE t; restore defaults SET GLOBAL query_cache_type= default; SET GLOBAL query_cache_size=@save_query_cache_size; # # MDEV-29028: Queries using RANDOM_BYTES get stored in query cache # set @qcache= @@global.query_cache_type; set global query_cache_type= 1; set query_cache_type= 1; create table t1 (a int); insert into t1 values (1000); flush status; select * from information_schema.global_status where variable_name in ('Qcache_inserts','Qcache_hits') order by variable_name; VARIABLE_NAME VARIABLE_VALUE QCACHE_HITS 0 QCACHE_INSERTS 0 select * from information_schema.global_status where variable_name in ('Qcache_inserts','Qcache_hits') order by variable_name; VARIABLE_NAME VARIABLE_VALUE QCACHE_HITS 0 QCACHE_INSERTS 0 select random_bytes(1024) = random_bytes(1024) as improbable; improbable 0 drop table t1; set global query_cache_type= @qcache; # # End of 10.10 tests #